一种实用的不变矩计算方法

Simple and Exact Computation of Moment Invariant

不变矩是图象的一种统计特征，满足平移、伸缩、旋转均不变的不变性，在图象识别领域得到了广泛应用。但是不变矩的计算是比较复杂的，计算工作量很大，特别是对于数字图象处理起来十分不便，例如由采样数据计算轴心轨迹图象的不变矩。本文提出了一种实用的计算二维图象不变矩的方法，并应用于轴心轨迹图的不变矩的计算。该方法充分利用了Ｗｉｎｄｏｗｓ内存位图功能，使得不变矩的计算不仅简单实用，而且精度较高。

This paper invariant are the statistics of image. There are translation-invariant, scale-invariant, and also rotation-invariant. They are applied to the recognition of image. It is very complex to compute them, especially those for digital image such as the orbit formed from the sampled time series. A computation of moment invariant for 2D image was proposed and applied to orbit. With memory bitmap of Windows system, the computation of moment invariants is simple, feasible and highly precise.